Best Time to See Whales in Massachusetts
August, July and April is the best time to see whales in Massachusetts. Based on 1,627 verified iNaturalist observations, here is exactly when whales are most active across the year in Massachusetts.
By Tim, founder of Easy Street Markets. I maintain the wildlife database and verify every animal and source myself. Updated July 2, 2026.
Humpback Whale · Jayne Buckley Sykes CC BY
Pygmy Sperm Whale · Martin Kaehrle CC BY
Atlantic White-sided Dolphin · Public domain CC0
1,627 verified observations of whales in Massachusetts, recorded across 12 months of the year on iNaturalist.
When whales are recorded in Massachusetts
Peak month
August
387 records (23.8% of the year)
| Month | Observations | Share |
|---|---|---|
| January | 38 | 2.3% |
| February | 51 | 3.1% |
| March | 76 | 4.7% |
| Aprilpeak | 242 | 14.9% |
| May | 127 | 7.8% |
| June | 108 | 6.6% |
| Julypeak | 255 | 15.7% |
| Augustpeak | 387 | 23.8% |
| September | 154 | 9.5% |
| October | 77 | 4.7% |
| November | 63 | 3.9% |
| December | 49 | 3% |
Whales you are most likely to see
| Species | Verified observations |
|---|---|
| Humpback Whale | 709 |
| North Atlantic Right Whale | 192 |
| Fin Whale | 160 |
| Common Dolphin | 150 |
| Common Minke Whale | 92 |
| Atlantic White-sided Dolphin | 90 |
| Harbour Porpoise | 51 |
| Sei Whale | 20 |
Weather to expect, source Open-Meteo
Typical weather in Massachusetts
Recent typical conditions by month, so you can plan a trip around both when whales are active and what the weather is doing. The best months to look for whales sit around 38 to 83 degrees Fahrenheit, so pack for that.
| Month | Avg high | Avg low | Rain |
|---|---|---|---|
| Jan | 37°F | 22°F | 3.8" |
| Feb | 39°F | 22°F | 3.4" |
| Mar | 48°F | 28°F | 3.6" |
| Aprbest time | 57°F | 38°F | 4.6" |
| May | 68°F | 47°F | 3.4" |
| Jun | 78°F | 58°F | 3.6" |
| Julbest time | 83°F | 65°F | 5.4" |
| Augbest time | 82°F | 64°F | 3.5" |
| Sep | 73°F | 56°F | 5.3" |
| Oct | 62°F | 47°F | 5.3" |
| Nov | 50°F | 34°F | 3.1" |
| Dec | 42°F | 27°F | 5.9" |
Typical recent conditions (5-year means) from the Open-Meteo archive, averaged for Massachusetts. Weather varies year to year, so treat these as a guide.
Sightings of whales in Massachusetts peak in August, when 387 of the year's 1,627 verified observations are logged — about 23.8% of the annual total. Activity stays high through August, July and April.
The quietest stretch is January, December and February, when whales are hardest to find — January sees just 38 records. If a reliable sighting matters, plan around the peak window rather than the off-season.
The whales you are most likely to encounter in Massachusetts are Humpback Whale, North Atlantic Right Whale and Fin Whale — the most-recorded species in the state. Each keeps its own seasonal rhythm, but the month-by-month pattern above reflects every reported sighting together.
Where to go
Best places to see whales in Massachusetts
- Appalachian National Scenic Trail — National Scenic Trail
- Blackstone River Valley National Historical Park — National Historical Park
- Boston Harbor Islands National Recreation Area — National Recreation Area
- Cape Cod National Seashore — National Seashore
- Adams National Historical Park — National Historical Park
- Boston African American National Historic Site — National Historic Site
Go see them · Massachusetts
Whale Watching Tour in Gloucester
You are guaranteed whale sightings on this whale watching tour out to Stellwagen Bank, a national marine preserve about 12 miles off the coast of...
Staying over? Compare places to stay near Appalachian National Scenic Trail
Frequently asked questions
What is the best month to see whales in Massachusetts?+
August is the single best month, and the broader peak window runs through August, July and April, based on 1,627 verified iNaturalist observations.
When are whales hardest to see in Massachusetts?+
January is the quietest month for whales in Massachusetts, with only 38 verified records.
Are whales active year-round in Massachusetts?+
Whales are recorded in 12 of 12 months in Massachusetts, so they can be seen year-round, with a clear peak in August.
More places to see whales
More wildlife in Massachusetts